Addition and subtraction

This dice train has been made using specific rules. How many different trains can you make?

Use the differences to find the solution to this Sudoku.

Use five steps to count forwards or backwards in 1s or 10s to get to 50. What strategies did you use?

Find the sum and difference between a pair of two-digit numbers. Now find the sum and difference between the sum and difference! What happens?

This challenge focuses on finding the sum and difference of pairs of two-digit numbers.

This challenge is about finding the difference between numbers which have the same tens digit.

In this calculation, the box represents a missing digit. What could the digit be? What would the solution be in each case?

In this game for two players, the aim is to make a row of four coins which total one dollar.

What two-digit numbers can you make with these two dice? What can't you make?

Investigate the different distances of these car journeys and find out how long they take.